Trainline

Backend engineer in travel insurance

In short

Senior backend engineer role at Trainline, a travel booking platform, working on travel insurance systems built with C# and .NET, microservices, and AWS infrastructure. The role involves shaping technical decisions, mentoring other engineers, and owning work from code through to production. Requires strong hands-on C#/.NET experience, microservices and distributed systems background, AWS/Terraform/CI/CD skills, observability tooling experience, and identity/authentication knowledge (OAuth2, OpenID Connect). Hybrid work from London, minimum 60% office time over a 12-week period.

About Trainline
At Trainline, our purpose is to empower greener travel choices, connecting people and places. Trainline enables millions of travellers to find and book the best value tickets across carriers, fares, and journey options through our highly rated mobile app, website, and B2B partner channels.
Responsibilities
•Shape technical decisions and help the team make good ones
•Coach and mentor other engineers, and learn from them too
•Own your work from code through to production, including deployment and monitoring
•Spot and remove blockers, time sinks and waste, for yourself and the team
•Keep quality high and keep improving the codebase
Requirements
•Communicate clearly and enjoy working as part of a team, whether that's pair-programming, mentoring or collaborating with front-end engineers and other disciplines
•Have strong hands-on C# and .NET experience, including recent features
•Have built and run microservices and event-driven systems, with a solid grasp of distributed systems and scale
•Are comfortable with AWS, Terraform and CI/CD pipelines
•Care about observability and keeping production reliable (New Relic, ELK or equivalents)
•Have worked with identity and authentication (OAuth2, OpenID Connect, IdentityServer)
•Are curious about AI and emerging tools
Nice to have
•Azure or GCP also valuable
Conditions
•Private healthcare & dental insurance
•A generous work from abroad policy (28-day Work from Abroad policy)
•2-for-1 share purchase plans
•An EV Scheme to further reduce carbon emissions
•Extra festive time off
•Excellent family-friendly benefits
•Clear career paths, transparent pay bands, personal learning budgets, and regular learning days
•Hybrid model: work from the office a minimum of 60% of time over a 12-week period

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